package br.skytef.stmanager.utils;

import javax.faces.context.FacesContext;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.servlet.http.HttpServletResponse;

public class CacheControl implements PhaseListener {  
	  
    private static final long serialVersionUID = 1L;  
  
    public PhaseId getPhaseId() {  
  
        return PhaseId.RENDER_RESPONSE;  
  
    }  
  
    public void afterPhase(PhaseEvent event) {  
  
    }  
  
    public void beforePhase(PhaseEvent event) {  
  
        FacesContext facesContext = event.getFacesContext();  
  
        HttpServletResponse response = (HttpServletResponse) facesContext  
  
        .getExternalContext().getResponse();  
  
        response.addHeader("Pragma", "no-cache");  
  
        response.addHeader("Cache-Control", "no-cache");  
  
        response.addHeader("Cache-Control", "no-store");  
  
        response.addHeader("Cache-Control", "must-revalidate");  
  
        response.addHeader("Expires", "Mon, 8 Aug 2006 10:00:00 GMT");  
  
    }  
  
} 
